Search results for "HORTICULTURE"
showing 10 items of 1421 documents
Micropropagation of Lavandula latifolia through nodal bud culture of mature plants
1996
Cultures of Lavandula latifolia Medicus were established from axillary buds of mature field-grown plants. Explants were initially cultured on media with two different macronutrient combinations and benzyladenine or kinetin added either individually or with naphthaleneacetic acid. Subsequently, explants were subcultured in Murashige and Skoog medium supplemented with 20% coconut milk, 0.57 μM indoleacetic acid and 8.88 μM benzyladenine. Shoot proliferation from axillary buds was not affected by seasonal fluctuations in the stock plants but depended on the macronutrient composition and on the type and concentration of cytokinin tested. Best results were obtained in explants initially cultured…
Effect of grafting on yield and quality of eggplant (Solanum melongena L.)
2013
Eggplants have fruits with different sizes, shapes and colours, according to the cultivar. Skin colour is due to anthocyanins, pigments located in the cell vacuole of fruit skin that belong to phenolic flavonoids, a powerful antioxidants group. Environmental conditions and growing techniques may influence fruits characteristics and their content of phenolic compounds. Grafting is a non chemical alternative for overcoming the effects of intensive and continuous cropping. The rootstocks preferred for eggplant are hybrids of tomato or tomato KVFN. Also species taxonomically close, as Solanum torvum, have been used and showed good vigour, compatibility and resistance to wilt disease. Informatio…
Lag time for germination of Penicillium chrysogenum conidia is induced by temperature shifts.
2013
In the environment, fungal conidia are subject to transient conditions. In particular, temperature is varying according to day/night periods. All predictive models for germination assume that fungal spores can adapt instantaneously to changes of temperature. The only study that supports this assumption (Gougouli and Koutsoumanis, 2012, Modelling germination of fungal spores at constant and fluctuating temperature conditions. International Journal of Food Microbiology, 152: 153-161) was carried out on Penicillium expansum and Aspergillus niger conidia that, in most cases, already produced germ tubes. In contrast, the present study focuses on temperature shifts applied during the first stages…
Micropropagation of adultLavandula dentataplants
1998
SummaryA protocol for in vitro propagation of adult Lavandula dentata plants has been achieved. Cultures were established by placing nodal segments on Murashige and Skoog medium containing BA, KIN, and NAA. Highest shoot multiplication rates were obtained when explants grown in the presence of 5.0 μM BA or 20 (JLM KIN were transferred to medium with 8.8 μM BA and 15% coconut milk. Multiplication efficiency through subcultures was significantly affected by the cytokinin concentration in the initial culture medium. Subculture reduced drastically the final number of shoots produced on nodal segments isolated from shoots grown in the presence of 2.0 μM BA or 40.0 μM KIN. Shoots were easily root…
The predatory mirid Dicyphus maroccanus as a new potential biological control agent in tomato crops
2014
The first record of the omnivorous predator Dicyphus maroccanus Wagner (Hemiptera: Miridae) inhabiting tomato crops in the Valencia region (East Coast of Spain) was in 2009. Since then, D. maroccanus has often been found preying on the eggs of Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) in this area. To evaluate this predator’s potential as a biological control agent, its life-history traits in the presence and absence of prey [(eggs of Ephestia kuehniella Zeller (Lepidoptera: Pyralidae)] on tomato plants were studied under laboratory conditions. Immature stages that preyed on eggs of E. kuehniella developed successfully. However, no nymph completed development on the plant without t…
Seaweed Extract Improves Lagenaria siceraria Young Shoot Production, Mineral Profile and Functional Quality
2021
Vegetable landraces represent the main source of biodiversity in Sicily. Lagenaria siceraria is appreciated by Southern Mediterranean consumers for its immature fruits and young shoots. Plant-based biostimulants supply, such as seaweed extract (SwE), is a contemporary and green agricultural practice applied to ameliorate the yield and quality of vegetables. However, there are no studies concerning the effects of SwE on L. siceraria. The current study evaluated the effects of SwE foliar application (0 or 3 mL L−1) on five L. siceraria landraces (G1, G2, G3, G4 and G5) grown in greenhouses. Growth traits, first female flower emission, fruit yield, young shoot yield, fruit firmness, young shoo…
Variabilité de la température entre 1951 et 2014 en Allemagne associée à l’évolution de la floraison des pommiers.
2018
Apple tree bloom onset in Germany has advanced by 2 days/decade in 1951-2014 and by 3 days/decade in 1988-2014, behaving similarly in respect to its evolution since 1951 and its sensitivity to temperature to other species’ phenological spring phases. The evolution however was not linear; by conducting a split moving-window dissimilarity analysis (SMWDA) we were able to detect the “break-period” 1987-1989 which coincides with a breakpoint that has been identified in the phases of the North Atlantic Oscillation (NAO). We observed distinct spatial patterns with apple bloom advancing from southwest to northeast and, most interestingly, a longitudinal gradient in the trend of apple bloom onset r…
Classification of stilbenoid compounds by entropy of artificial intelligence
2013
A set of 66 stilbenoid compounds is classified into a system of periodic properties by using a procedure based on artificial intelligence, information entropy theory. Eight characteristics in hierarchical order are used to classify structurally the stilbenoids. The former five features mark the group or column while the latter three are used to indicate the row or period in the table of periodic classification. Those stilbenoids in the same group are suggested to present similar properties. Furthermore, compounds also in the same period will show maximum resemblance. In this report, the stilbenoids in the table are related to experimental data of bioactivity and antioxidant properties avail…
Vineyard design supported by GPS application
2021
The innovative technologies of precision agriculture offer nowadays new applications in line with the needs of the wine sector. In hillside viticulture, within the same plot there are areas with different physical and chemical characteristics (lying, pH, active limestone, nutrients, etc.). This variability consequently influences the vigor of the vine which translates into a different production per single plant in terms of both yield and quality of the grapes. The aim of this study was to realize geo-referenced thematic maps by GPS application on a hilly plot covering about 6 hectares to be planted in a hedgerow trained vineyard for the production of quality grapes. The experimental tests …
RESTORATION OF LATVIAN ALFALFA (Medicago sativa) GENETIC RESOURCES PERSPECTIVE FOR BREEDING
2015
We have carried out restoring of some Latvian alfalfa genetic resources from seeds of accessions that did not germinate in soil at all. Two of them were repatriated from the N. Vavilov All-Russian Institute of Plant Industry (multiplied more than 40 years ago) and three from the Research Institute of Agriculture (Latvia) (multiplied 15-20 years ago). For germination of old seeds we used early elaborated in vitro culture conditions. Germination rate ranged 2-60%, depending from the genotype and seeds storage conditions. Plantlets with well developed roots and 2-3 leaves were planted in the substrate in small pots and grown in a greenhouse about a month, then replanted in the soil in field co…